package ptaweek2;

import java.math.BigInteger;
import java.util.Scanner;
public class Topic08 {
	public static void main(String[] args)
	{
		Scanner sc=new Scanner(System.in);
		BigInteger sum=new BigInteger("0");
		String a=sc.next();
		if(a.equalsIgnoreCase("e")||a.equalsIgnoreCase("E")){
			return ;
		}
		
		
	}
	
}
